基于HSI彩色空间的遥感影像阴影探测方法  

Shadow Detection Method of Remote Sensing Image Based on HSI Color Space

作　　者：何浩[1] 杨非凡 HE Hao;YANG Fei-fan(College of Civil and Architectural Engineering,Xinjiang University,Urumqi Xinjiang 830017,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830017

出　　处：《地矿测绘》2022年第1期5-8,共4页Surveying and Mapping of Geology and Mineral Resources

基　　金：2021年新疆维吾尔自治区自然科学基金项目“基于高光谱遥感影像的城市叶面积指数监测研究”(2021D01C054);2021年新疆维吾尔自治区级大学生创新训练计划项目“城市扩张对天山北坡城市群大气湿度的影响分析”(S202110755118)。

摘　　要：在高分辨率遥感影像阴影提取中阈值确定是阴影提取准确与否的关键。为此,文章提出了一种基于HSI彩色空间的遥感影像阴影探测方法。该方法在HSI彩色空间的亮度分量内,将地物视为亮度较低的阴影和亮度较高的非阴影两部分。在亮度影像的灰度直方图内,分别存在两个波峰。取两个波峰间的最小值对应的灰度级作为分割阴影的阈值。结果表明,该方法相比传统的阴影检测方法,精确度更高且对阴影细部具有较好的检测效果。In the shadow extraction of high-resolution remote sensing images,the threshold setting is the key to the accuracy of shadow extraction.Therefore,a shadow detection method based on HSI color space was proposed.In the intensity component of HSI color space,the ground object is regard as two parts:the shadow with low intensity and the non-shadow with high intensity.In the gray histogram of intensity image,there are two peaks respectively.The gray scale corresponding to the minimum value between two wave peaks was taken as the threshold value of segmentation shadow.The results show that compared with the previous methods,this proposed method has higher accuracy and better detection effect on shadow details.

关 键 词：遥感影像 阴影探测 彩色空间 HSI 亮度分量 双峰分裂 

分 类 号：P237[天文地球—摄影测量与遥感]